Java uses Apache Commons Codec to implement HTML encoding/decoding, converting special characters into HTML entity format
Maven coordinates:
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.15</version>
</dependency>
Apache Commons Codec is a Java based string encoding/decoding tool library. It provides a series of common encoding and decoding algorithms and string conversion functions, including Base64, Hex, HTML entity encoding, and so on.
In this example, we will use Apache Commons Codec to implement HTML encoding/decoding, converting special characters into HTML entity format.
Firstly, we need to import the required classes:
import org.apache.commons.codec.StringEscapeUtils;
Next, we can use the 'StringEscapeUtils' class for HTML encoding/decoding. Here is a complete example:
public class HtmlEncodingExample {
public static void main(String[] args) {
String input = "<h1>Hello, world!</h1>";
System.out.println("Input: " + input);
//Encode HTML
String encoded = StringEscapeUtils.escapeHtml(input);
System.out.println("Encoded: " + encoded);
//Perform HTML decoding
String decoded = StringEscapeUtils.unescapeHtml(encoded);
System.out.println("Decoded: " + decoded);
}
}
Running the above code will output the following content:
Input: <h1>Hello, world!</h1>
Encoded: <h1>Hello, world!</h1>
Decoded: <h1>Hello, world!</h1>
In this example, we first defined a string containing special characters. Then, we use the 'StringEscapeUtils. escapeHtml' method to HTML encode the string and decode it using the 'StringEscapeUtils. unescapeHtml' method.
Summary:
Apache Commons Codec is a powerful Java string encoding/decoding tool library that provides multiple encoding and decoding algorithms and string conversion functions. Using the 'StringEscapeUtils' class of this library, we can easily encode/decode HTML and convert special characters into HTML entity format.
